I'm sorry you feel this way and obviously din't feel good about the apartment. I need to explain somethings about your 'cons' for others to understand your complains.
The painting is a nice and neutral Art work of a girl with her finger on her lips IKEA), it's colorful and not intended to make you be silent, you're the first one to feel that way.
In the apartment there is a constant temperature of around 22 degrees and that is normally enough for most people! I did explain to you how to turn the heating up and as there are only two buttons, one up (red) and one down (blue), it's very easy and clear how to use it and I'm sorry you didn't call me again to help you with it.
About the Hairdryer, there is no mention on the website about a hairdryer because there isn't one (I cannot mention everything that isn't available!). I would have been happy to provide one for you but ordering me to go and get one on a Sunday morning right before check-out is certainly not the best moment to do so. Maybe next time you could check for it before you wash your hair. Saying you both got sick is not correct to blame it on the hairdryer, only Ipek had washed her hair and you Burhan hadn't done so.
Anyway, I will make sure that a Hairdryer is available as soon as possible.
I thought you were a lovely couple and did leave you a nice review ;-)